منابع مشابه
Extracting seismic core phases with array interferometry
[1] Seismic body waves that sample Earth’s core are indispensable for studying the most remote regions of the planet. Traditional core phase studies rely on well-defined earthquake signals, which are spatially and temporally limited. We show that, by stacking ambient-noise cross-correlations between USArray seismometers, body wave phases reflected off the outer core (ScS), and twice refracted t...
متن کاملDynamic ray tracing and traveltime corrections for global seismic tomography
We present a dynamic ray tracing program for a spherically symmetric Earth that may be used to compute Fréchet kernels for traveltime and amplitude anomalies at finite frequency. The program works for arbitrarily defined phases and background models. The numerical precisions of kinematic and dynamic ray tracing are optimized to produce traveltime errors under 0.1 s, which is well below the data...
متن کاملDetection of T-phases at Island Seismic Stations: Dependence on Seafloor Slope, Seismic Velocity and Roughness
The hydroacoustic segment of the International Monitoring System (IMS) currently being installed for use in verifying compliance with the Comprehensive Nuclear Test Ban Treaty (CTBT), will consist of six hydrophone stations and five supplemental T-phase stations. The ability to detect acoustic signals at T-phase stations relies on an understanding of the acoustic to seismic coupling mechanisms....
متن کاملQuantifying the Cosmic Web I: The large-scale halo ellipticity-ellipticity and ellipticity-direction correlations
The formation of dark matter halos tends to occur anisotropically along the filaments of the Cosmic Web, which induces both ellipticity-ellipticity (EE) correlations between the shapes of halos, as well as ellipticity-direction (ED) cross-correlations between halo shapes and the directions to neighboring halos. We analyze the halo catalogue and the semi-analytic galaxy catalogue of the recent M...
متن کاملWKB calculation of quantum adiabatic phases and nonadiabatic corrections
2014 Berry discovered that wave functions may acquire a geometrical phase factor, in addition to the usual dynamical phase, during an adiabatic cycle with period T. The dynamical and Berry phases are here recognized as the first two terms in a systematic WKB expansion in powers of 03B5 = 1/ T. We thus provide a simple method for the calculation of adiabatic phases and for a consistent inclusion...
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ژورنال
عنوان ژورنال: Geophysical Journal International
سال: 1996
ISSN: 0956-540X,1365-246X
DOI: 10.1111/j.1365-246x.1996.tb01533.x